// -*- mode:c++;indent-tabs-mode:nil;c-basic-offset:4;coding:utf-8 -*-
// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi
//
// Copyright 2024 Mozilla Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once
#include <pthread.h>

template<typename T>
struct ThreadLocal
{
    explicit ThreadLocal(void (*dtor)(T* value))
    {
        if (pthread_key_create(&key_, (void (*)(void*))dtor))
            __builtin_trap();
    }

    ~ThreadLocal()
    {
        if (pthread_key_delete(key_))
            __builtin_trap();
    }

    void set(T* value)
    {
        if (pthread_setspecific(key_, value))
            __builtin_trap();
    }

    T* get()
    {
        return (T*)pthread_getspecific(key_);
    }

  private:
    pthread_key_t key_;
};
